Joseph Ferrari (DePaul University) and Sarah Sanders (Illinois School of Professional Development) published one of the first studies specifically aimed at exploring the relation between measures of procrastination and adult ADHD. They collected data from a group of adults (18 men, 11 women, average age of approximately 49 years) from a western Chicago support group for adults with attention deficit disorder.
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The comparison they made between the groups was on three measures of procrastination. The details about these measures are not that important as all three are highly correlated. The key thing is that one measured decisional procrastination and the two others behavioral procrastination. The results of the comparison of the ADHD group with the community sample revealed that adults diagnosed with ADHD reported significantly higher decisional and behavioral procrastination. As Ferrari and Sanders write, the results "support the clinical diagnoses that frequent delays in completing tasks may be a symptom of AD/HD disorder."
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